>>3104787I owned the 645D for a while, and it's a painfully slow camera, I'll tell you that. Practically no buffer, have to wait 3+ seconds just so you can preview the image you just shot and so on. It's still a better option than an old digital back as it's a fully integrated and sealed camera, but I can't see myself using something like that again. Also I hate it when cameras have a base 200ISO.
A lot of people gush over the "CCD look" but I can't say I was a major fan of the way it rendered images, as they seemed too "cooked" out of camera (yes, the RAWs) and deviating from that was pretty difficult, I'll take higher dynamic range and lower noise any day.
I ended up upgrading to the 645Z mainly for the live view alone, but it's a hell of a lot faster and the dynamic range is bonkers as well. I would stick with what you have and save up for that or something similar like a Fuji GFX if you desperately want that big sensor and resolution.
Also, I think it goes without saying, but these big cameras are very vibration-prone, so make sure to have a good tripod handy. The Z has a smoother shutter actuation than most similarly-sized cameras, but you still need at least twice the shutter speed of your focal length just to use it hand-held. You won't do those 40-50mp of resolution justice shooting hand-held or on a $100 chink shit tripod.
